If X+1=1, then what is X?
June 30, 2015
GMAT OFFICIAL GUIDE PS Solution: To solve, we substitute -1 for x in the equation: (x^4 – x^3 + x^2)/(x – 1) ((-1)^4 – (-1)^3 + (-1)^2)/(-1 – 1) …
If p is the product of the integers from 1 to 30…
June 30, 2015
GMAT OFFICIAL GUIDE PS Solution: We are given that p is the product of the integers from 1 to 30 inclusive, which is the same as 30!. We know …
Machine A produces bolts at a uniform rate of 120 every 40…
June 30, 2015
Machine A produces bolts at a uniform rate… Solution: We are given that machine A produces bolts at a uniform rate of 120 every 40 seconds. Thus, the rate …
Which of the following inequalities is an algebraic expression…
June 29, 2015
GMAT OFFICIAL GUIDE PS Solution: We start by expressing the interval on the number line as an inequality: -5 ≤ x ≤ 3 Looking at answer choices A and …
A certain characteristic in a large population has a distribution
June 26, 2015
GMAT OFFICIAL GUIDE PS Solution: This problem is testing us on symmetric distributions. In any symmetric distribution with mean m and standard deviation d, 50% of the data values …
On a recent trip, Cindy drove her car 290 miles, rounded to…
June 26, 2015
GMAT OFFICIAL GUIDE PS Solution: In solving this problem we must remember that we are given a rate in miles per gallon. It follows that: Rate = Distance/Gallons We …
If money is invested at r percent interest, compounded annually…
June 26, 2015
GMAT OFFICIAL GUIDE PS Solution: Although this question appears as if we may have to do a lot of calculating, we actually do not. Focus on the first sentence …
To mail a package, the rate is x cents for the first pound…
June 26, 2015
GMAT OFFICIAL GUIDE PS Solution: We can solve this problem by first creating equations for the given information. We know that the rate is x cents for the first …